Telaprevir is an oral, direct acting hepatitis C virus (HCV) protease inhibitor that was used in combination with other antiviral agents in the treatment of chronic hepatitis C, genotype 1. Approved for use in the United States in 2012, it was withdrawn in 2015 when regimens of all oral direct acting agents with superior efficacy and better tolerance became available. Telaprevir was not linked to instances of acute liver injury during therapy, but was linked to cases of severe cutaneous reactions such as DRESS and Stevens Johnson syndrome which were associated with mild hepatic injury. In addition, when combined with peginterferon and ribavirin, telaprevir was associated with cases of hepatic decompensation in patients with preexisting cirrhosis.